I do not believe she was having an affair while we were together. I think that my treatment of her (based on my own lack of communication), her inability to share her feelings, and certain events in her life (brother died, friend murdered, self-esteem issues/depression) led her to a grass is greener/what if life crisis. She could see the changes I made, but thinks it's too late. 11 years takes a lot to undo. She needs this time apart to realize what she has.

I understand giving her room. I understand the implications of an affair. If she is not having one, couldn't prolonged no contact make it easier to drift apart. Couldn't this even lead to an affair, if she thinks I've moved on completely and is lonely